Reversible spindle drive for spinning and twister frames



March 8, 1932. J F, JACKSON 1,848,424

REVERSIBLE SPINDLE DRIVE FOR SPINNING AND TWI STER FRAMES Filed April 50, 1931 Patented ZMar. .8,

; UNITED? STATES: P ed TEEN]? -OFFICEI i iuieoirinn 00., or rnwrucknnnnonn ISLAND :aEvERsiBLE srnvrona DRIVEFOR SPINNiN G TwIsTEIi. FRAMES Application filed April 30,

This invention relates to reversible spindle drives for spinningand twister framesand has for its primary object to provide means wholly automatic by which the slack of the driving tape may be taken up regardless of the direction in which the machine is operating.

Another objectof the invention is to prov 7 vide means whereby one idler pulley responds to the drivingforc e ofthe tape while the other is actuated to take up any slack which may occur in the tape.

Further objects and advantages of the invention will'become apparent as the description proceeds, referencebeinghad to the accompanying drawing; in which The figure is an end elevation partly diagrammatic of the device for use in (3011]11110- tion withthe usual spinning frame.

It has heretofore been proposed to provide take-up devices which are actuated by bellcrank levers in connection with the idler pulf leys' or in weightingthe main drive pulley to produce tension throughoutthe entire strip. Such devices are, of course, operative only in a single direction. It has also been proposed to weight :each of the idler pulleys 1 in such a manner as to be ind I pendently' operative.

The purpose ofthe present-invention is to provide unitary means whereby the structure is greatly simplified and in which the action in each direction is correspondingly the same,

In proceeding in accordance with the present invention. a driving pulley l is shown which is mounted and actuated in the usual manner; Idler pulleys: 2 and 3 are adjustably mounted above the plane of thedriving pulley. The idler pulleys 2 and 3 are carried by pulley arms 4 and 5 respectively and 7 may be shifted longitudinally of said pulley and by adjustment of nuts 6 and 7 which eX- tend through slots 8 and9 of the pulley arms. The idler pulleys 2 and 3 are provided" with the usual bearing. cradles 10 and 11. Shaft I brackets 12 and 13 are provided and have outwardly extendingvprojections 14 and '15 at theirlower ends. Stop pins 16 and 17 are iesifs'eriai No. 533m. V a v carried by pulley armsd'and 5 adjacent the projections 14 and 'l5 and are adapted toen and are connected by stop pins 18 and 19 .to across arm20 whichlat'ter carries a weight lbfitW'GBIl'ltS ends. The weight of pulley arms 4 and 5 is supported by shafts 22 and 23' I which engagei-infslotted portions 24 and 25 provided therefor in the j respective shaft brackets 12 and 13. It will be seen that since structures is fulcrumed" at a point directly above the axisof rotation, theetfect of 'weight' 21 is to urge the idler pulleys and their carry- JOHN R'JAcKsoN, or IPAWTUCKET, :antonn ISLAND, nssrcnon ro as; & BFAMERICAN the. weight of the respective idler pulley ing structurestoward each other, this being so because the con'necting'pins of the weight carrying'orossibar,20 arespaced a distance from the fulcrum andihence weight 21 imparts a turnin' pulley structure. v I

In operation, and assuming the direction of rotationv of the driving pulley 1 to be in a direction designated by the arrow, pulley 2 becomes the idlerpulley by virtue of the tape A running over it and holdingthe stop pin 16 *inengagementfwith projection 14 of the in shaft bracket12. Theother'pulley 3 now g movement tothe entire idler acts to tension the tape A: since the. stop 17* is forced 'away "from projection 15" by the action of the weight 21onthe cross bar. "It is of course obviousthat when the direction of rotation is reversed, pulley 3 will become the idler pulley function of the tensioning pulley.

Having described my invention what I claim as new and desire to, secure by Letters Patentis: v I

1. In a device of the class described, a driving pulley, a tape driven bysaid pulley, a pair of shaft brackets having downwardly inclined slotted portions adjacent their lower ends, outwardlyw extendingrprojections carried at the outer lower sides of said shaft brackets, a pair of pulley arms carried by said shaft brackets and having portions ens gaged in the slots of said brackets, said pul ley arms having outwardly extended upper andpulley 2 will perform the ends and having longitudinal slots, a pair of pulley carrying brackets adjustably con nected to said pulley arms by fasteners enging in said slots, a pair of pulleys carried y said last named brackets and adapted to be driven by said tape, a cross bar pivotally and. adiustably connected to the outer end of the outwardly extended ends of said pu1- arms, a weight carried by said crossbar le whereby. the pulleys. are urgeditoward each.

i by said pulley,

other, and stop pins carrie arms and engaging the projections of said shaft braekets-to-limit the extent ofoutward motion of said pulley arms to said shaft brackets.

2. In a device of the class described, a driving pulley, a tape driven by said pulley, a pair ofoshaft brackets having outwardly extending projections adjacent their lower ends,la pair. of pulley arms carried by said shaft brackets outward lateral extensions carried b said pulley arms adjacent their up r en s, a pair of pulleys carried by said pu y arms and adapted to be drivenby said tape, a crossbar adjustably and pivotally carried by said pulley arms at oints adjacent the outer ends of the lateraextensions thereof, a weight carried by said crossbar between itsends whereby the pulleys and pulley armsare urged toward each other, and

means carried by the pulley arms to limit the outward motion of said arms relative to said shaft brackets andby engagement with said projections of the shaft brackets. I

3. In a device of the class described, a driving pulley, a pair of driven pulleys, a tape' trained over said pulleys to drive the same, a pair of shaft brackets, a pair of pulleyarms carried by said shaft brackets and carrying said pulleys,;a cross bar connected to said pulleyarms, a weightcarried by said cross bar whereby the pulleys and pulley arms are urged toward'each other, and means carried by said pulley arms to engage said shaft brackets wherebythe relative motionof the arms to the bracketsis limited.

Intestimony whereof I- have signed my name to this specification.

JOHN F. JACKSON. 

